Computer Systems Engineer

Building secure, scalable backend systems for a fintech and Web3 platform. - Designed a 4-service microservice backend with role-based access (10+ roles), powering 4 public and back-office apps from one secure platform. - Integrated identity verification, payments, AML screening, and digital asset custody providers (Idenfy, Stripe, AMLBot, BitGo), enabling compliant onboarding and transactions. - Cut query latency 75% through data modeling and caching, handling 20,000+ concurrent users at <300 ms and <1% errors. - Built an event-driven architecture across 6+ services, processing 1,000+ messages/day with 100% delivery. - Eliminated missed transactions by redesigning blockchain reconciliation, safeguarding financial integrity. - Implemented monitoring and observability with real-time alerts and error detection across 4+ apps. - Raised test coverage from 25% to 75%+ in 3 months and automated CI/CD, cutting deployment time from 1 day to 3 hours. Skills: NestJS · TypeScript · PostgreSQL · Redis · RabbitMQ · Docker · Microservices

Led the rollout of new operational systems across UNO's service station network in El Salvador. - Trained 100+ employees across 15+ stations nationwide in 3 months, standardizing operations. - Configured and deployed systems on-site in 2 days or less per station. - Reached full system adoption at every location within 1 week of launch. Skills: Systems Implementation · Technical Training · On-site Support